Anharmonic Vibrational Dynamics of DNA Oligomers

Details Anharmonic Vibrational Dynamics of DNA Oligomers Anharmonic Vibrational Dynamics of DNA Oligomers

2008-12-17

arxiv.org/abs/0812.3335v1

Physics

Chemical Physics

CECAM Workshop on Energy Flow Dynamics in Biomaterial Systems, Paris, October 2007

Scientific paper

Combining two-color infared pump-probe spectroscopy and anharmonic force field calculations we characterize the anharmonic coupling patterns between fingerprint modes and the hydrogen-bonded symmetric NH$_2$ stretching vibration in adenine-thymine dA$_{20}$-dT$_{20}$ DNA oligomers. Specifically, it is shown that the anharmonic coupling between the NH$_2$ bending and the CO stretching vibration, both absorbing around 1665 cm-1, can be used to assign the NH$_2$ fundamental transition at 3215 cm-1 despite the broad background absorption of water.

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